Fatigue testing and analysis using the hot spot method

Abstract

The structural stress or hot spot method of fatigue
analysis draws its origins
from the offshore industry where it has been used for
many years as an accurate
means of performing fatigue assessments of welded
structures. Today the method
is increasingly finding use for more common plate welded
structures like ship
hulls and land vehicle chassis. The design curves for the
hot spot method,
however, are still a problem due to the lack of test data
needed to establish
reliable life curves.
This publication presents an overview of the hot spot
method including
the hot spot stress concept and a comparison of the
reference curves used for
fatigue life estimation found in several design codes or
non-standard
documents. Four of the six curves considered give
approximately the same life
estimate for a given stress, but the remaining two are
significantly different.
Experimental hot spot stress measurements for one
relatively simple test
specimen geometry and one larger more complex component
are presented together
with a fatigue test data. Fatigue data are compared with
existing reference
curves.

abstract = "The structural stress or hot spot method of fatigue analysis draws its origins from the offshore industry where it has been used for many years as an accurate means of performing fatigue assessments of welded structures. Today the method is increasingly finding use for more common plate welded structures like ship hulls and land vehicle chassis. The design curves for the hot spot method, however, are still a problem due to the lack of test data needed to establish reliable life curves. This publication presents an overview of the hot spot method including the hot spot stress concept and a comparison of the reference curves used for fatigue life estimation found in several design codes or non-standard documents. Four of the six curves considered give approximately the same life estimate for a given stress, but the remaining two are significantly different. Experimental hot spot stress measurements for one relatively simple test specimen geometry and one larger more complex component are presented together with a fatigue test data. Fatigue data are compared with existing reference curves.",

N2 - The structural stress or hot spot method of fatigue
analysis draws its origins
from the offshore industry where it has been used for
many years as an accurate
means of performing fatigue assessments of welded
structures. Today the method
is increasingly finding use for more common plate welded
structures like ship
hulls and land vehicle chassis. The design curves for the
hot spot method,
however, are still a problem due to the lack of test data
needed to establish
reliable life curves.
This publication presents an overview of the hot spot
method including
the hot spot stress concept and a comparison of the
reference curves used for
fatigue life estimation found in several design codes or
non-standard
documents. Four of the six curves considered give
approximately the same life
estimate for a given stress, but the remaining two are
significantly different.
Experimental hot spot stress measurements for one
relatively simple test
specimen geometry and one larger more complex component
are presented together
with a fatigue test data. Fatigue data are compared with
existing reference
curves.

AB - The structural stress or hot spot method of fatigue
analysis draws its origins
from the offshore industry where it has been used for
many years as an accurate
means of performing fatigue assessments of welded
structures. Today the method
is increasingly finding use for more common plate welded
structures like ship
hulls and land vehicle chassis. The design curves for the
hot spot method,
however, are still a problem due to the lack of test data
needed to establish
reliable life curves.
This publication presents an overview of the hot spot
method including
the hot spot stress concept and a comparison of the
reference curves used for
fatigue life estimation found in several design codes or
non-standard
documents. Four of the six curves considered give
approximately the same life
estimate for a given stress, but the remaining two are
significantly different.
Experimental hot spot stress measurements for one
relatively simple test
specimen geometry and one larger more complex component
are presented together
with a fatigue test data. Fatigue data are compared with
existing reference
curves.